Quality – VitaminLoft

What we testPurity, potency, contaminants.

Every product we stock is independently tested before we agree to sell it — and we spot-check incoming batches on a rotating basis. Testing covers three categories:

Potency

Does the bottle contain the amount of active ingredient the label claims? (Surprisingly often, the answer for untested brands is "no".)

Purity

Is it free of heavy metals (lead, mercury, cadmium, arsenic), pesticide residues, and microbial contamination?

Identity

Is the ingredient actually what the label says it is? Important for botanicals where misidentification is common.

Stability

Does the product maintain potency through its shelf life under normal storage conditions?

Certifications we recognizeWhat the seals mean.

NSF Certified for Sport

NSF is an independent public-health organization. "Certified for Sport" adds screening against more than 280 banned substances. Learn more at NSF →

USP Verified

United States Pharmacopeia verifies product identity, potency, purity, and manufacturing quality. One of the strictest seals in the supplement category. About USP Verified →

Non-GMO Project Verified

The most rigorous Non-GMO verification available in North America. About the Non-GMO Project →

cGMP facility

"Current good manufacturing practice" — FDA regulations that supplement facilities must meet. Not a seal, but the baseline we require of every brand we carry.

NSF Certified USP Verified Non-GMO Project Clean Label Project cGMP

Sample lab resultWhat a certificate of analysis looks like.

Every product page links to the certificate of analysis (CoA) for the batch you're receiving. A CoA lists the test methods, the lab, and the results for each target analyte.

Example only — live CoAs are linked from each product page.

Have a testing question?

We're happy to share our process and testing partners. Our team replies within 4 business hours.

Contact us Ingredient glossary